When it comes to Wi-Fi, criminals are looking for ways to get in. The worst part is, it's not that hard for someone to use your Wi-Fi to connect to the internet, especially if you haven't changed your password.

It may seem innocent that someone's tapping into your Wi-Fi. But you're paying for your Wi-Fi router and you're paying your internet provider for that signal. They're stealing your money.

They're also slowing down your internet connection. It could be people who live nearby who use it for convenience.

Worse, it could be a cybercriminal who's using your Wi-Fi to conduct illegal activities. The cops will come knocking on your door.

Protect yourself from Wi-Fi thieves

Here's a simple way to keep criminals out of your Wi-Fi. It's called SoftPerfect WiFi Guard and it keeps your connection secure.

Note: The trial version is free for Windows and Mac users on up to five detections. Mac users pay just under $10 (see below).

It shows you a list of digital devices on your network. Here's how it works.

The SoftPerfect WiFi Guard doesn't kick unauthorized users off of your Wi-Fi. You have to take action, like change your router settings and update your passwords.

If some of your valid connections are marked in red, select them and click on the Properties tab. Choose "I know this computer" to give it future clearance.

Download instructions

Windows

Click the Windows link below. Scroll to the bottom of the page >> underneath For Windows, click the green button Download WiFi Guard installer >> choose the EXE file. WiFi Guard will automatically download. When it's finished, open it and follow the step-by-step installation instructions.

As we said earlier, the trial version is free to use for up to five detections. For the full version, it costs $19 for home users and $39 for businesses.

Mac

Click the Mac link below. Scroll to the bottom of the page >> underneath For Mac OS, click the orange button that says Get from Mac AppStore. It'll take you to the iTunes page where WiFi Guard costs $19 for home users and $39 for businesses and the trial version is free to use for up to five detections.